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What is the main purpose of the Cache-Control header in an HTTP response?

easy📝 Conceptual Q11 of 15
Rest API - Request and Response Format
What is the main purpose of the Cache-Control header in an HTTP response?
ATo indicate the response content type
BTo encrypt the response data for security
CTo specify the server's IP address
DTo tell browsers how long to keep the response data
Step-by-Step Solution
Solution:

  1. Step 1: Understand the role of Cache-Control

    The Cache-Control header instructs browsers and caches how long they can store the response data before requesting it again.

  2. Step 2: Compare options with Cache-Control purpose

    Only To tell browsers how long to keep the response data correctly describes this behavior. Other options describe unrelated functions.

  3. Final Answer:

    To tell browsers how long to keep the response data -> Option D

  4. Quick Check:

    Cache-Control = Duration for caching [OK]
Quick Trick: Cache-Control controls data storage time in browsers [OK]
Common Mistakes:
MISTAKES
  • Confusing Cache-Control with security headers
  • Thinking Cache-Control sets content type
  • Assuming Cache-Control reveals server info

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